Thanks for writing draft-larsson-v6ops-mip-scenarios-00.txt
Its combination matrix was useful to me to see how many cases are indeed possible and to know where to look for possible tools. It's good to have such an exhaustive list.
I have however only one little and precise particular interest: a Mobile IPv6 Mobile Node (no Mobile IPv4) handing over between GPRS, UMTS and public WiFi NAT'ed networks. This says almost everything about their type: their wireless is asymmetric, exclusively IPv4 and behind NAT and the NAT's are very different from one another. The new protocol should be run on the MN itself and on one (not several) entity outside the access network.
Do you think this particular scenario is captured by the draft? Do you think line 4 of Table 1 matches my scenario?
Finally, I tend to agree with a solution that does not bring in large modifciations to Mobile IPv6 nor Mobile IPv4. I mean, there may exist nice interesting possiblities to use a v6 Home Address with Mobile IPv4 and vice-versa but I imagine modifying the code to support that and, I'm a bit afraid.
Just some thoughts on the draft...
Alex
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